On Wed, 11 May 2022 18:21:29 +0100, Andre Przywara wrote:
The "bti" selftests are built with -nostdlib, which apparently automatically creates a statically linked binary, which is what we want and need for BTI (to avoid interactions with the dynamic linker).
However this is not true when building a PIE binary, which some toolchains (Ubuntu) configure as the default. When compiling btitest with such a toolchain, it will create a dynamically linked binary, which will probably fail some tests, as the dynamic linker might not support BTI: =================== TAP version 13 1..18 not ok 1 nohint_func/call_using_br_x0 not ok 2 nohint_func/call_using_br_x16 not ok 3 nohint_func/call_using_blr .... ===================
[...]
Applied to arm64 (for-next/kselftest), thanks!
[1/1] kselftest/arm64: bti: force static linking https://git.kernel.org/arm64/c/d7a49291d786